Results 11 to 20 of about 1,123,379 (326)

Estimation of Concentrations in Chemical Systems at Equilibrium Using Geometric Programming [PDF]

open access: yesJournal of Chemical and Petroleum Engineering, 2017
Geometric programming is a mathematical technique, which has been developed for nonlinear optimization problems. This technique is based on the dual program with linear constraints.
Saeedeh Ketabi   +2 more
doaj   +1 more source

Rhodium-Catalyzed Synthesis of Organosulfur Compounds Involving S-S Bond Cleavage of Disulfides and Sulfur

open access: yesMolecules, 2020
Organosulfur compounds are widely used for the manufacture of drugs and materials, and their synthesis in general conventionally employs nucleophilic substitution reactions of thiolate anions formed from thiols and bases.
Mieko Arisawa, Masahiko Yamaguchi
doaj   +1 more source

Equilibration Times of Dissolved Inorganic Carbon During pH Transitions

open access: yesFrontiers in Earth Science, 2022
Equilibration times of dissolved inorganic carbon (DIC) depend on conversion reactions between CO2(aq) and the dissociation products of carbonic acid [S = (H2CO3) + (HCO3−) + (CO32−)].
Ziv Sade, Shahar Hegyi, Itay Halevy
doaj   +1 more source

Hydrogenated borophene enabled synthesis of multielement intermetallic catalysts

open access: yesNature Communications, 2023
Supported metal catalysts often suffer from rapid degradation under harsh conditions due to material failure and weak metal-support interaction. Here we propose using reductive hydrogenated borophene to in-situ synthesize Pt/B/C catalysts with small ...
Xiaoxiao Zeng   +12 more
doaj   +1 more source

Understanding Le Châtelier’s principle fundamentals: five key questions

open access: yesChemistry Teacher International, 2021
The well-known Le Châtelier’s principle is almost always mentioned when dealing with chemical equilibrium. Nevertheless, although a must in most general chemistry courses starting from the secondary level, when students face questions about it, some ...
Peris Miguel
doaj   +1 more source

Experimental Determination of the MnO Activity Coefficient in High-Manganese Slags Using the Chemical Equilibrium Method

open access: yesMetals, 2021
The thermodynamics of manganese oxide in high-MnO-containing slags was investigated using the chemical equilibrium method in the temperature range of 1623 to 1723 K.
Elizaveta Cheremisina   +5 more
doaj   +1 more source

The statistical hadronization model approach to $\sqrt{s_{NN}}=200$ GeV Au-Au collisions: $p_{T}$-spectra fits and global variable predictions [PDF]

open access: yes, 2006
Three possible scenarios of the statistical hadronization model are reexamined with the use of the $p_{T}$ spectra of the PHENIX and very low $p_{T}$ PHOBOS measurements at $\sqrt{s_{NN}}=200$ GeV.
Dariusz Prorok   +3 more
core   +2 more sources

Magnetic and electronic properties of porphyrin-based molecular nanowires

open access: yesAIP Advances, 2016
Using spin-polarized density functional theory calculations, we performed theoretical investigations on the electronic and magnetic properties of transition metal embedded porphyrin-based nanowires (TM-PNWs, TM = Cr, Mn, Co, Ni, Cu, and Zn).
Jia-Jia Zheng   +4 more
doaj   +1 more source

A Calculation of Baryon Diffusion Constant in Hot and Dense Hadronic Matter Based on an Event Generator URASiMA [PDF]

open access: yes, 2000
We evaluate thermodynamical quantities and transport coefficients of a dense and hot hadronic matter based on an event generator URASiMA (Ultra-Relativistic AA collision Simulator based on Multiple Scattering Algorithm).
A. Nakamura   +18 more
core   +2 more sources

Analisis Dampak Kesalahan Konsep Laju Reaksi Terhadap Kesalahan Konsep Kesetimbangan Pada Siswa SMA

open access: yesJurnal Pendidikan Sains, 2015
: This study was designed to analyze the misconception of the chemistry subject reaction rate and chemical equilibrium and the effect of the misconceptions on the chemical equilibrium con-cept. The subjects of the research are two homogenous classes from
Yeyek Ihdal Umam   +2 more
doaj   +1 more source

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